CN102276362B - High-concentration compound fertilizer - Google Patents
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Abstract
The invention provides a high-concentration compound fertilizer which is prepared from the following components in parts by weight, namely 35 parts of ammonium phosphate, 30 parts of ammonium hydrogen carbonate, 20 parts of calcium superphosphate, 15 parts of potassium chloride, 40 parts of potassium sulfate, 50 parts of urea, 10 parts of ammonium sulfate, 10 parts of ammonium chloride and 10 parts of kaolin (nucleating agent) through multiple chemical reactions. The high-concentration compound fertilizer has a special formula design, wherein the ratio of N to P to K reaches 40.625:23.4:21.0,the content of N and P and K reaches 85.625 percent which greatly exceeds 45 percent, and the exceeding value is 40.625 percent; and the high-concentration compound fertilizer has the characteristicsof no acidization and alkalization to soil and does not harden soil. A production process of the high-concentration compound fertilizer comprises the steps of: guniting through a high tower, granulating through a rotary hub, drying for two times and cooling for two times, wherein in processes of drying and cooling, a chemical reaction process of a composite material is further promoted and perfected.
Description
Technical field
The present invention relates to composite fertilizer, be specifically related to a kind of high-concentration compound fertilizer.
Background technology
Soil is the basis of agricultural, and fertilizer is crop " grain ".Chemical fertilizer is that the indispensable important material of current food crop production increase supports.Composite fertilizer has that nutrient content is high, and minor component is few, and the advantage such as physical behavior is good, for balance fertilizing, improves utilization rate of fertilizer, promotes the high crop yield stable yields that very important effect is arranged.Test result according to national chemical fertilizer try net: reasonably nitrogen, phosphorus, potassium coordinate, and can make increasing production of rice 40.8%, corn yield increasing 46.1%, wheat increase yield 56.6%, Yield Increase In Cotton 48.6%, Semen Brassicae campestris volume increase 64.4%, soybean yield-increasing 17.9%.Therefore, the development high-concentration compound fertilizer is imperative.
At present, the development of composite fertilizer has three advantages: the firstth, and many kinds customizations, Different Crop have different special fertilizers.The secondth, multifunctional medical useization combines agricultural chemicals and chemical fertilizer, can play the effect of multiple effect.The 3rd is high-concentration long-acting, and the application of this type fertilizer has reduced the fertilising consumption, can improve utilization rate of fertilizer, and the saving of labor is laborsaving, save time, and upgrading synergy.It is one of industry of national encourage growth that composite fertilizer produces, and its product to developing agricultural, improves grain and yield of commercial crops directly for the agriculture production service, and important realistic meaning is arranged, and meets the developing direction of national industrial policies adjustment and the Scientific Outlook on Development.At present, China farm crop produce and use straight fertilizer more, nitrogen, phosphorus, potassium ratio imbalance in fertilising, and the hardening soil, soil fertility descends, and Fertilization Level is well below developed country's level.
Simultaneously, chemical fertilizer utilization ratio is well below advanced international standard.This had both wasted a large amount of financial resources, and material resources and resource have caused again unnecessary environmental pollution.In recent years, the advantage such as various long-acting specific complex (mixing) fertilizer has comprehensive nutrition, reasonable ratio, and is with strong points, that fertilizer efficiency period is long, utilization ratio is high, and the crop increasing degree is large is conducive to economize on resources, and reduces agriculture production cost, increases farmers' income.
/ 3rd of a not enough demand of present real estate chemical fertilizer.The most of need is transported into from other provinces, and haul distance is far away, and trucking costs is high, has increased agriculture production cost, and supply is also untimely, and there is potential threat in agricultural development.Therefore, implement the high-concentration compound fertilizer project, compare with single component urea, synthetic ammonia etc., can obtain more to process added value, can be for enterprise create economic benefit preferably, the not only benign development of promoting enterprise self, and can drive the development of supporting enterprise and related industries, make this enterprise in sustainable development, drive Regional Economic Development.
Existing known composite fertilizer batching and the prepared granular compound fertilizer General N of production technique: P:K are the growth needs that this compatibility of 15:15:15[is not suitable for farm crop], well-known: farm crop will experience from sowing-results: 1, the seeding stage; 2, the jointing stage; 3, minute evil phase; 4, the filling stage; And the required nutrient of each crop in vegetative period is not identical, and particularly the filling stage, crop takes second place as leading K take N and P; Crop utilization N and P are under photosynthesis, and be synthetic: Yeast Nucleic Acid and amino acid are for grouting; And N:P:K=15:15:15 composite fertilizer, nitrogen, phosphorus, potassium proportioning are uneven, easily cause the hardening soil, the problem that soil fertility descends, and fertilizer efficiency is bad.The inventor, from 1992---1998, went through for seven years, 31, whole nation provinces and cities and autonomous region have been gone around, to the weather of various places, soil characteristic, relative humidity, which kind of fertilizer is main farm crop kind be badly in need of ... etc. carried out intensive investigation, and done hundreds of time experiment and tests; Now obtained 100% success!
Summary of the invention
The technical problem that the present invention solves is, overcomes existing composite fertilizer nitrogen, phosphorus, potassium ratio uneven, and particularly acid base concentration is unreasonable, easily causes the hardening soil, the problem that soil fertility descends.
The technique means that the present invention adopts is: a kind of high-concentration compound fertilizer, it is characterized in that, mainly by ammonium phosphate, bicarbonate of ammonia, calcium superphosphate, Repone K, vitriolate of tartar, urea, ammonium sulfate, ammonium chloride and kaolin are made through the multiple chemical reaction process, its each component weight quota proportioning is: ammonium phosphate 30～40, bicarbonate of ammonia 25～35, calcium superphosphate 15～25, Repone K 10～25, vitriolate of tartar 35～45, urea 35～60, ammonium sulfate 10～15, ammonium chloride 10～15, kaolin 10～25;
Its preparation technology comprises the steps:
Batch mixing:Batching: solid material sent into the raw material hopper and drop into dissolving tank after fragmentation, then add a certain proportion of water and heat with inner steam coils, temperature is controlled at 95-110 ℃, and uric acid concentration is 85%-95%; Add initiator ammonium persulfate in mixed slurry still, after initiator adds five minutes, then add the polymerizing catalyst thionamic acid; The amount that adds entry guarantees that the liquid-solid ratio of total mass is 1.25～1.30:1.00;
Granulation:Raw material and system's returning charge that batching drops into enter tablets press together, returning charge is than being 1:3, under controlling, digital control system sprays into the urine slurry of set amount, spray into simultaneously a certain amount of steam, keep the skin wet and heat, make material reach suitable liquid-solid ratio, the liquid-solid ratio of controlling its total mass is 1.25～1.30:1.00, then the granulating of reuniting under the rotation that turns the hub tablets press delivers to drying by belt conveyer;
Dry:Send into the first dry kiln baking after 19 minutes from tablets press granulation material out, send into again the second dry kiln by rotary conveyor, carry out redrying; 120-135 ℃ of the inlet air temperature of the first dry kiln, temperature out＜70 ℃, residence time of material is 19 minutes, outlet material moisture＜2%; The inlet air temperature of the second dry kiln is 60-90 ℃ of outlet material moisture＜1.5%;
Cooling:From out material product moisture of the second dry drying kiln＜1.5%, enter twice cooling kiln cooling continuously; Material cooling time in cooling kiln is 18 minutes; Cooling rear material (temperature＜20 ℃) its moisture＜1.4% for the second time; Send the coating machine coating through screening;
Coating:The coating agent is prepared by oil and amine sheet, and ratio is 5～8:1, and oil sump temperature is controlled at 90 ℃ ± 5 ℃ finished products after coating and delivers to automatic packing machine and pack.
Further illustrate, its each component weight quota proportioning is ammonium phosphate 35kg, N:7.595kg wherein, P:18.8125kg; Bicarbonate of ammonia 30Kg is N:5.10Kg wherein; Calcium superphosphate 20kg is P:4.56kg wherein; Repone K 15kg is K:3.09kg wherein; Vitriolate of tartar 40kg, wherein potassium K:17.92kg; Urea 50kg, wherein N:23.25kg; Ammonium sulfate 10kg, wherein N:2.28kg; Ammonium chloride 10kg, wherein N:2.4kg; Kaolin 10kg(nucleator), total nutritive ingredient of 9 kinds of materials [wherein: N:40.625kg, P:23.3725kg, K:21.01kg];
【N+P+K=85.625%】。
Compared to existing technology, the present invention has following advantage:
The present invention has considered the equilibrium problem of acid base concentration, according to actual measurement: its [PH=6.8～7.8]; And the best acid base concentration of plant (comprising farm crop) growth is: [PH=6.00～8.00]; Because any crop it self just have pair soda acid to reconcile, the function of balance; If PH=7, crop just is difficult to absorb like this; The fertilizer efficiency effect is little; And PH=6.8～7.8 just in time are in optimum value; Simultaneously, this composite fertilizer nutrient content is high, and minor component is few, and physical behavior is good, for balance fertilizing, is a kind of high-concentration compound fertilizer that improves utilization rate of fertilizer.
Formulating of recipe of the present invention is unique: N:P:K=40.6:23.4:21.0; N+P+K=85.625% has substantially exceeded 45% standard, and its exceedance is: 40.625%; To soil soda acid not, do not harden [PH=6.8～7.8]; To the negative impact that farm crop do not have the single administration inorganic fertilizer to bring, nuisanceless pollution.Make it generate high-concentration compound fertilizer by secondary or chemical reaction repeatedly, its production technique is unique: high tower spraying, turn the hub granulating, and two bakings, two is cold; Wherein in baking and cold process, will further promote and improve the chemical reaction process of compound substance.Its chemical reaction: 1, replacement(metathesis)reaction; 2, replacement(metathesis)reaction; 3, neutralization reaction; 4, molecule or molecular grouping fission polyreaction; Last PH=6.8～7.8; Be more suitable for the scope of the needs [PH=6～8] of plant growth!
And performance of the present invention reaches following index:
(1) high density: product nutrient (N+P
2O
5+ K
2O) can reach more than 48%, reach [N+P now
2O
5+ K
2O]=85.625%;
(2) high nitrogen-containing: generally this product " N " element reaches 15%, even can reach 20%.And this formulating of recipe: " N ": 40.625;
(3) high strength: it is 1.4% that this product detects moisture, reaches lower than its ultimate compression strength of GB (2.0%): 18N;
(4) low chlorine content: high analysis urea-based compound fertilizer is chloride 14.45%, and identical nutrient content ammonium chloride series composite fertilizer chloride be 36.5%, if replace Repone K with vitriolate of tartar, can produce without chlorine composite fertilizer.And the content of this formulating of recipe chlorine＜2%;
(5) low Biuret Content: the Biuret Content of this product is 0.76%, meets the standard of GB urea acceptable end product biuret＜1.00%.
(6) slow-releasing: high analysis urea-based compound fertilizer is compared with ammonium chloride compound fertilizer, and solubility rate is low by 20.7% in 60h, and solvability is low by 23.2%, and obvious long-acting function is arranged.
Embodiment
The specific embodiment formula
Urea-base compound fertilizer of the present invention is to use: ammonium phosphate (NH
4) PO
4, urea Co(NH
2)
2, bicarbonate of ammonia NH
4C0
3, primary ammonium phosphate NH
4H
2P0
4With ammonium chloride NH
4CL etc. are nitrogenous source, then are equipped with Repone K KCL, vitriolate of tartar K
2SO
4, kaolin AI
2(SiO
2O
5) (OH)
4Base fertilizers such as (this are nucleator) carries out secondary or multiple chemical reaction process as raw material, and processing is produced, high concentration N, and phosphorus, the potassium multi-component composite fertilizer, the production method of often doing has: extrusion process, granulating method, slurry process, melting method etc.Wherein conventional granulating method and slurry process are the most commonly used, and adopt the melt tower granulation method production urea-base compound fertilizer as a kind of composite fertilizer production novel technique to have the unrivaled advantage of other production way.Compare with other the production method of several urea-base compound fertilizers such as granulating method, slurry process, fused mass granulating method advantage in every respect is still fairly obvious, the urea-base compound fertilizer of its production can reach higher uniform particle size, and balancing water, nutrient, and this is to adopt other method to be difficult to realize.As a kind of new process of production of composite fertilizer, played positive promoter action for the overall technology level that improves the production of domestic composite fertilizer.
Urea-base compound fertilizer is with ammonium phosphate (NH
4)
3PO
4, urea Co(NH
2)
2, bicarbonate of ammonia NH
4C0
3, primary ammonium phosphate NH
4H
2PO
4With ammonium chloride NH
4CL is nitrogenous source, then is equipped with Repone K KCL, vitriolate of tartar K
2SO
4, and kaolin AI
2(SiO
2O
5) (OH)
4Base fertilizers such as (nucleators) carries out secondary and chemical reaction process repeatedly as raw material and processes producing, high concentration N, and phosphorus, the potassium multi-component composite fertilizer, the production method of often doing has: extrusion process, granulating method, slurry process, melting method etc.Wherein conventional granulating method and slurry process are the most commonly used, and adopt the melt tower granulation method production urea-base compound fertilizer as a kind of composite fertilizer production novel technique to have the unrivaled advantage of other production way, becoming a hot technology in present domestic field of compound fertilizer production.
Technical process of the present invention comprises:
1, the raw materials such as phosphorus potash fertilizer and stopping composition are sent into respectively production line road junction separately, carry out automatic blending by the computer control burden balance.
Solid material is sent into the raw material hopper after fragmentation, machine is controlled burden balance and dropped into dissolving tank by proportioning as calculated.Dissolving tank is controlled by digital control system and is added a certain proportion of water (to guarantee the liquid-solid ratio of its total mass: 1.25～1.30:1.00) and heat with the steam coils of inside, temperature is controlled at 95～110 ℃, uric acid concentration is 85%～95%(massfraction, and is lower same).
2, raw material and system's returning charge of batching post input enter tablets press together; returning charge is than being 1:3; under controlling, digital control system sprays into the urine slurry of set amount; spray into simultaneously a certain amount of steam; keep the skin wet and heat; make material reach suitable liquid-solid ratio, then the granulating of reuniting under the rotation of rotary drum granulator delivers to dry post by belt conveyer.This granulation process has utilized liquid phase, low moisture, the high viscosity characteristics of urine slurry to make the material granulating, and tablets press outlet material moisture drops to 4% by 6%, greatly reduces drying load.Composite fertilizer is by being arranged on several shower nozzles in tablets press in granulation process; to urinate slurry and evenly spray, apply, be wrapped in the solid materials surface; rotation reunion granulating along with material; because material particles is along with the whitewashing coating is constantly grown up; form suitable fertiliser granulates; so, the ultimate compression strength of product (＞18N newton), slow-releasing is good.
3, after tablets press granulation material is out sent into the 1# dry kiln, then send into the 2# dry kiln, carry out redrying.120-135 ℃ of the inlet air temperature of 1# dry kiln, temperature out＜70 ℃, residence time of material is 19min, outlet material moisture＜2%; The inlet air temperature of 2# dry kiln is 60-90 ℃ of outlet material moisture＜1.5%, and dry required hot gas is provided by efficient energy-saving furnace, and the dry coal consumption of composite fertilizer per ton is 8kg only, and the ordinary combustion stove is 20kg, improves efficiency 60%.And to add Wingdale in coal be calcium carbonate CaCO
3, its chemical reaction process:
4, reach the product moisture requirement from 2# kiln material out, entered cooling kiln cooling [cooling through twice].Cooling rear material (temperature＜20 ℃) send the coating machine coating through screening for the second time.The coating agent is prepared by oil and amine sheet, and ratio is 5-8:1, and oil sump temperature is controlled at 90 ℃ ± 5 ℃ finished products after coating and delivers to automatic packing machine and pack.
In technological process of the present invention, include but not limited to following chemical reaction:
（NH
4）
3PO
4+KCL→?NH
4CL+?K
3PO
4；
CN
2H
4O+KCL→NH
4CL+K
2O
CO（NH
2）
2+K
2SO
4→（NH
4）
4SO
4+K
2O
Ca（H
2PO
4）
2·H
2O+（NH
4）
2SO
4→CaSO
4+（NH
4）
3PO
4+H
2O
NH
4CL+CO（NH
2）
2→（NH
4）H
2CL+H
20
K
2SO
4+Ca（H
2PO
4）
2·H
2O→CaSO
4+K
3PO
4+H
2O
KCL+NH
4H
2PO
4→NH
4CL+K
3PO
4+H
2O
NH
4H
2PO
4+（NH
4）
2S
2O
8→PO
4 -+NH
4 ++H
++SO
4 -
（NH
4）
3PO
4+（NH
4）
2S
2O
8→NH
4 ++PO
4 -+H
++SO
3 -
PO
4 -+NH
4 ++H
++SO
- 4+NH
4HCO
3→（NH
4）
3PO
4+NH
4CO
3
NH
4 ++PO
- 4+H
++CO
- 3+NH
4HCO
3→（NH
4）
3H
2PO
4+（NH
4）
3H
2CO
3
In production technique of the present invention:
1) in 9 kinds of simple substance raw material slip stirred autoclaves, add initiator: ammonium persulphate (NH
4)
2S
20
8, purpose is: the molecular chain of 9 kinds of simple substance materials is disintegrated, their chemical bond, covalent linkage, fracture; Make it to become the dispersion ion of free state;
2) add the initiator stirring reaction after 5 minutes, then adding polymerizing catalyst, thionamic acid, H
3NS0
3. continue to stir 5 minutes, purpose is again: through a series of chemical reaction, just generate a kind of new molecule and molecular grouping of novel substance in reactor, generated a kind of novel substance--[high-concentration compound fertilizer];
3) ammonium persulphate, thionamic acid, in reaction process, and after reaction, its essence does not change; These two kinds of materials (itself be exactly a kind of special agricultural chemicals, in the ratio proportioning of agricultural chemicals: water=1:85, can be directly to vegetables, melon and fruit sprays) have double effects!
The present invention has considered the equilibrium problem of acid base concentration, according to actual measurement: its [PH=6.8～7.8]; And the best acid base concentration of plant (comprising farm crop) growth is: [PH=6.00～8.00]; Because any crop it self just have pair soda acid to reconcile, the function of balance; If PH=7, crop just is difficult to absorb like this; The fertilizer efficiency effect is little; And PH=6.8～7.8 just in time are in optimum value; Simultaneously, this composite fertilizer nutrient content is high, and minor component is few, and physical behavior is good, for balance fertilizing, is a kind of high-concentration compound fertilizer that improves utilization rate of fertilizer.
Formulating of recipe of the present invention is unique: N:P:K=40.6:23.4:21.0; N+P+K=85.625% has substantially exceeded 45% standard, and its exceedance is: 40.625%; To soil soda acid not, do not harden [PH=6.8～7.8]; Product of the present invention is 25 ℃ of temperature environments, under every premium on currency 500g high-concentration compound fertilizer concentration conditions; Measured result: its [PH=6.8～7.8]; Any soil (no matter acid soil or alkaline soil) is wherein comprised the negative impact that does not have the single administration inorganic fertilizer to bring to farm crop, nuisanceless pollution to any crop.Because any soil property, the needed acid base concentration of any crop is: in the scope of PH=6～8; Make it generate high-concentration compound fertilizer by secondary or chemical reaction repeatedly, to the negative impact that farm crop do not have the single administration inorganic fertilizer to bring, nuisanceless pollution.
Claims (2)
1. high-concentration compound fertilizer, it is characterized in that, mainly by ammonium phosphate, bicarbonate of ammonia, calcium superphosphate, Repone K, vitriolate of tartar, urea, ammonium sulfate, ammonium chloride and kaolin are made through the multiple chemical reaction process, its each component weight quota proportioning is: ammonium phosphate 30～40, bicarbonate of ammonia 25～35, calcium superphosphate 15～25, Repone K 10～25, vitriolate of tartar 35～45, urea 35～60, ammonium sulfate 10～15, ammonium chloride 10～15, kaolin 10～25;
Its preparation technology comprises the steps:
Batch mixing:Batching: solid material sent into the raw material hopper and drop into dissolving tank after fragmentation, then adding a certain proportion of water, heating with inner steam coils, temperature is controlled at 95-110 ℃, and uric acid concentration is 85%-95%; Add initiator ammonium persulfate in mixed slurry still, after initiator adds five minutes, then add the polymerizing catalyst thionamic acid; The amount that adds entry guarantees that the liquid-solid ratio of total mass is 1.25～1.30:1.00; Initiator is that its add-on of ammonium persulphate is 2% of total mass; Polymerizing catalyst is thionamic acid, and add-on is 2% of total mass;
Granulation:Raw material and system's returning charge that batching drops into enter tablets press together, returning charge is than being 1:3, under controlling, digital control system sprays into the urine slurry of set amount, spray into simultaneously a certain amount of steam, keep the skin wet and heat, make material reach suitable liquid-solid ratio, the liquid-solid ratio of controlling its total mass is 1.25～1.30:1.00, then the granulating of reuniting under the rotation that turns the hub tablets press delivers to drying by belt conveyer;
Dry:Send into the first dry kiln baking after 19 minutes from tablets press granulation material out, send into again the second dry kiln by rotary conveyor, carry out redrying; 120-135 ℃ of the inlet air temperature of the first dry kiln, 70 ℃ of temperature out ﹤, residence time of material are 19 minutes, outlet material moisture＜2%; The inlet air temperature of the second dry kiln is 60-90 ℃ of outlet material moisture ﹤ 1.5%;
Cooling:From out material product moisture of the second dry drying kiln＜1.5%, enter twice cooling kiln cooling continuously; Material cooling time in cooling kiln is 18 minutes; Cooling rear temperature of charge＜20 ℃ for the second time, its moisture＜1.4%; Send the coating machine coating through screening;
Coating:The coating agent is prepared by oil and amine sheet, and ratio is 5～8:1, and oil sump temperature is controlled at 90 ℃ ± 5 ℃ finished products after coating and delivers to automatic packing machine and pack.
2. high-concentration compound fertilizer according to claim 1, is characterized in that, its each component weight quota proportioning is ammonium phosphate 35kg, N:7.595kg wherein, P:18.8125kg; Bicarbonate of ammonia 30Kg, wherein N:5.10Kg; Calcium superphosphate 20kg is P:4.56kg wherein; Repone K 15kg is K:3.09kg wherein; Vitriolate of tartar 40kg, wherein potassium K:17.92kg; Urea 50kg, wherein N:23.25kg; Ammonium sulfate 10kg, wherein N:2.28kg; Ammonium chloride 10kg, wherein N:2.4kg; Kaolin 10kg, the nutritive ingredient of 9 kinds of materials, wherein, N:40.625kg, P:23.3725kg, K:21.01kg.
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| CN 201110212272 CN102276362B (en) | 2011-07-28 | 2011-07-28 | High-concentration compound fertilizer |
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|---|---|---|---|
| CN 201110212272 CN102276362B (en) | 2011-07-28 | 2011-07-28 | High-concentration compound fertilizer |
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| CN102276362B true CN102276362B (en) | 2013-05-08 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659461B (en) * | 2012-04-20 | 2013-07-17 | 陕西景盛肥业集团有限公司 | High-porosity compound fertilizer high tower granulating method and high-porosity compound fertilizer |
| CN102690148B (en) * | 2012-06-13 | 2014-03-26 | 贵州省土壤肥料研究所 | Fertilizer special for long-term slow-releasing houttuynia cordata and preparation method thereof |
| CN102942413A (en) * | 2012-11-08 | 2013-02-27 | 成都新柯力化工科技有限公司 | Slow soluble fertilizer and preparation method |
| CN103319238B (en) * | 2013-06-19 | 2014-07-23 | 菏泽金正大生态工程有限公司 | Water soluble fertilizer and preparation method thereof |
| CN103524171B (en) * | 2013-09-27 | 2015-09-30 | 张爱萍 | Long-term slow-release horticultural fertilizer |
| CN104591894A (en) * | 2015-01-09 | 2015-05-06 | 安徽瑞虎肥业有限公司 | Preparation method of controlled release type fertilizer |
| CN105801271A (en) * | 2016-04-18 | 2016-07-27 | 嘉施利（平原）化肥有限公司 | Nitrogen-phosphorus-potassium high-concentration compound fertilizer and preparation method thereof |
| CN107141048B (en) * | 2017-07-12 | 2020-08-21 | 辽宁隆翔肥业有限公司 | Production method of guniting high-nitrogen fertilizer |
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| CN1196344A (en) * | 1998-03-03 | 1998-10-21 | 邹宇超 | Method for making mixed compound fertilizer |
| CN1297869A (en) * | 1999-12-01 | 2001-06-06 | 四川大学 | Method of producing ternary composite azophoska |
| CN101037370A (en) * | 2007-02-06 | 2007-09-19 | 济南神力工贸有限公司 | Whole-fertilizer compound fertilizer and preparation method |
| CN101134689A (en) * | 2006-08-29 | 2008-03-05 | 石称华 | Complete-element high-concentration water-soluble long-acting compound fertilizer and method for manufacturing same |
-
2011
- 2011-07-28 CN CN 201110212272 patent/CN102276362B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196344A (en) * | 1998-03-03 | 1998-10-21 | 邹宇超 | Method for making mixed compound fertilizer |
| CN1297869A (en) * | 1999-12-01 | 2001-06-06 | 四川大学 | Method of producing ternary composite azophoska |
| CN101134689A (en) * | 2006-08-29 | 2008-03-05 | 石称华 | Complete-element high-concentration water-soluble long-acting compound fertilizer and method for manufacturing same |
| CN101037370A (en) * | 2007-02-06 | 2007-09-19 | 济南神力工贸有限公司 | Whole-fertilizer compound fertilizer and preparation method |
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